Front wheel brake mechanism
1 – nipple for bleeding the front brake mechanism drive; 2 – connecting pipe of working cylinders; 3 – wheel cylinder piston; 4 – wheel cylinder lock; 5 – brake shoe lining; 6 – sealing ring; 7 – dust cap; 8 – pad fastening pins; 9 – caliper mounting bolt to bracket; 10 – steering knuckle; 11 – caliper mounting bracket; 12 – support; 13 – protective cover; 14 – cotter pin; 15 – brake shoe pressure spring; 16 – brake pads; 17 – wheel cylinder; 18 – brake disc
Front Brake Caliper Parts
1 – piston; 2 – dust cap; 3 – sealing ring; 4 – support with cylinders; 5 – connecting pipe of wheel cylinders; 6 – air release nipple; 7 – brake shoe pressure spring; 8 – brake shoe mounting pins; 9 – cotter pins; 10 – springs; 11 – brake pads
The front wheel brake mechanism is a disc brake. It consists of the parts shown in Fig. Front wheel brake mechanism and Front wheel brake mechanism support parts: support 12 (4) assembled with working cylinders 17, brake disc 18, two brake shoes 16 (11), connecting pins 8 (8) and pipelines.
The support is attached to the bracket 11 with two bolts 9, which are locked by bending the locking plates to the edge of the bolts. The bracket 11 in turn is attached to the flange of the steering knuckle 10 together with the protective casing 13 and the steering lever. A radius groove is made in the support, through which the brake disk 18 passes and two transverse grooves for placing the brake shoes 16. In the lugs of the support there are two windows with guide grooves, in which two opposite cylinders 17 are installed. To fix the cylinders relative to the support, a spring retainer 4 is installed in the cylinder, entering the side groove of the support.
Each cylinder contains a piston 3 (1), which is sealed by a rubber ring 6 (3). It is located in the groove of the cylinder and tightly compresses the surface of the piston. The cylinder cavity is protected from contamination by a rubber cap 7 (2).
The working cavities of the cylinders are connected to each other by pipeline 2 (5). A nipple 1 (6) for bleeding the front brake drive circuit is screwed into the outer cylinder, and a hose nipple for supplying brake fluid is screwed into the inner cylinder.
Piston 3 rests against brake shoes 16, which are mounted on pins 8 and pressed against them by springs 15 (7). Pins 8 are held in the cylinder by cotter pins 14 (9).
Brake disc 18 is secured to the wheel hub with two mounting pins.